Make winvnc4 and Windows vncconfig compilable via MinGW.


git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@3913 3789f03b-4d11-0410-bbf8-ca57d06f2519
diff --git a/configure.ac b/configure.ac
index 47091b4..f030412 100644
--- a/configure.ac
+++ b/configure.ac
@@ -160,5 +160,7 @@
 win/Makefile
 win/vncviewer/Makefile
 win/rfb_win32/Makefile
+win/vncconfig/Makefile
+win/winvnc/Makefile
 po/Makefile.in
 ])